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Java Input-Output Monad

There is a newer version: 3.0.0-RC2

package jio.console;

import jio.IO;
import jsonvalues.JsObj;

import java.util.function.Function;

/**
 * Represents a command that shuts down the console. Usage: {@code exit}
 * 
 * This command terminates the console application.
 */
class ExitCommand extends Command {

  private static final String COMMAND_NAME = "exit";

  public ExitCommand() {
    super(COMMAND_NAME,
          "Shut down the console");
  }

  @Override
  public Function> apply(final JsObj conf,
                                              final State state
                                             ) {
    System.out.println("bye bye");
    System.exit(0);
    return null;
  }
}